| 冷拉拔变形量对Cu-Al2O3弥散强化铜合金线材组织性能的影响 |
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| 引用本文： | 彭冬冬,鲁世强,甘春雷,王顺成,张冬平.冷拉拔变形量对Cu-Al2O3弥散强化铜合金线材组织性能的影响[J].金属热处理,2020,45(2):29-35. |
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| 作者姓名： | 彭冬冬 鲁世强 甘春雷 王顺成 张冬平 |
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| 作者单位： | 1. 南昌航空大学 航空制造工程学院, 江西 南昌 330063;
2. 广东省材料与加工研究所, 广东 广州 510650 |
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| 基金项目： | 广东省科技计划;广州市科技计划;广东省科学院项目 |
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| 摘 要： | 对退火态Cu-0.2%Al2O3弥散强化铜合金进行最大变形量达99％的冷拉拔加工,采用光学显微镜、扫描电镜、X射线衍射仪和拉伸试验机等测试手段,研究了冷拉拔变形量对合金微观组织、织构、导电率及力学性能的影响规律。结果表明:随着冷拉拔变形量的增加,合金的微观组织由较粗的长条形组织变成细长的纤维组织,并且经过大变形量冷拉拔加工后部分Al2O3颗粒发生了破碎;当变形量为0%时,合金的织构由黄铜织构{011}<211>和立方织构{001}<100>组成,冷拉拔变形量达到60%后,部分立方织构和黄铜织构逐渐转变为高斯织构{011}<100>和铜型织构{112}<111>;冷拉拔变形量对合金导电率几乎没有影响;合金的显微硬度从141 HV0.3增加到161 HV0.3,而合金的抗拉强度由492 MPa增加到637 MPa,屈服强度由452 MPa增加到605 MPa,伸长率由14.0%下降至1.0%,并且发现合金拉伸断裂为韧性断裂。研究结果表明Cu-0.2%Al2O3弥散强化铜合金具有较优良的塑性加工性能。
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| 关 键 词： | Cu-0.2 Al2O3弥散强化铜合金 冷拉拔变形 微观组织 织构 力学性能 韧性断裂 |
| 收稿时间： | 2019-04-29 |
Effect of cold drawing deformation on microstructure and properties of Cu-Al2O3 dispersion strengthened copper alloy wire |
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| Peng Dongdong,Lu Shiqiang,Gan Chunlei,Wang Shuncheng,Zhang Dongping.Effect of cold drawing deformation on microstructure and properties of Cu-Al2O3 dispersion strengthened copper alloy wire[J].Heat Treatment of Metals,2020,45(2):29-35. |
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| Authors: | Peng Dongdong Lu Shiqiang Gan Chunlei Wang Shuncheng Zhang Dongping |
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| Affiliation: | 1. School of Aeronautical Manufacturing Engineering, Nanchang Hangkong University, Nanchang Jiangxi 330063, China;
2. Guangdong Institute of Materials and Processing, Guangzhou Guangdong 510650, China |
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| Abstract: | The annealed Cu-0.2%Al2O3 dispersion strengthened copper alloy was cold-drawn with the maximum deformation amount of 99%. The effect of cold drawing deformation on the microstructure, texture, electrical conductivity and mechanical properties of the alloy was studied by means of optical microscope, scanning electron microscopy, X-ray diffraction and mechanics tester. The results show that with the increase of cold drawing deformation amount the microstructure of the alloy changes from coarser elongated structure to fibrous one. When the deformation amount is 0%, the textures of Cu-0.2%Al2O3 alloy are composed by brass {011}<211> and cube {001}<100> textures. After 60% cold deformation amount some cube and brass textures are gradually transformed into goss {011}<100> and copper {112}<111> texture. And the cold drawing deformation amount has almost no effect on the conductivity. The microhardness of the alloy increases from 141 HV0.3 to 161 HV0.3. While the tensile strength increases from 492 MPa to 637 MPa, yield strength increases from 452 MPa to 605 MPa, and the elongation decreases from 14.0% to 1.0%, respectively. It is found that the tensile fracture of the alloy is ductile. Therefore, it can be concluded that the Cu-0.2%Al2O3 dispersion strengthened copper alloy has excellent plastic workability. |
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| Keywords: | Cu-0 2%Al2O3 dispersion strengthened copper alloy cold drawing deformation microstructure texture mechanical properties ductile fracture |
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